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December 5, 2025

NYISO Installed Capacity/Market Issues Working Group (ICAP-MIWG)

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NYISO Monitor Says More Data Needed to Verify Out-of-market Actions
The NYISO Market Monitoring Unit told the Installed Capacity Working Group that more data is necessary to verify the need for out-of-market actions on the part of transmission owners for reliability.
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NYISO Begins to Discuss Demand Curve Reset Process Changes
Discussion about potential changes to the NYISO demand curve reset process dominated a recent Installed Capacity Working Group meeting and will likely take up more oxygen in stakeholder meetings throughout the coming year.
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NYISO Meeting Briefs: Nov. 3-4, 2025
NYISO presented the results of Phase 1 of the 2024 Cluster Study process at a special Operating Committee meeting.
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NYISO: Winter Reliability Proposal to Increase Market Efficiency
NYISO’s consumer impact analysis for the Winter Reliability Capacity Enhancements project found that under the scenarios it considered, installed capacity procurement costs would drop by 15 to 45% depending on locality
Potomac Economics
NYISO Monitor Report Highlights Generator Outages During Heat Wave
As NYISO continues its Capacity Market Structure Review, the Market Monitoring Unit used its second-quarter State of the Market report to highlight potential issues with how the ISO forecasts resource availability.
Ben Schumin, CC BY-SA-2.0, via Wikimedia
NYISO Unveils Changes to Demand Curve
NYISO has proposed to stop using “winter to summer” and “summer to winter” ratios to determine maximum clearing and reference point prices in its seasonal demand curves.  
NYISO
NYISO Stakeholders Concerned About Lack of Data on Supplemental Commitments
Stakeholders requested the NYISO Market Monitoring Unit provide an explanation of the difficulties in obtaining data from the ISO and market participants on supplemental commitments after it presented its State of the Market report for the first quarter.
Plaza Construction
NYISO Drops Seasonal CAFs from Winter Reliability Project
NYISO told stakeholders it was no longer considering seasonal capacity accreditation factors because it found they would disincentivize participation in the capacity market.
NYISO
NYISO Presents Informational CAFs for Non-firm Generators
NYISO provided a glimpse into the possible capacity accreditation factors for gas generator units that have not guaranteed a supply of fuel for the winter capability period.
Hydro-Québec
NYISO Proposes ICAP Changes for New Entry Ahead of CHPE
NYISO is proposing changes to certain capacity market parameters to accommodate the Champlain Hudson Power Express transmission project, as well as facilitate the new entry of resources.

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